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(No Model.) 4 Sheets-Sheet 1.

' E. SELLING.

CALCULATING MACHINE.

1 Patented Feb. 4, 1890.

FIBI.

WITN ESSES INVENTDR w ,5}

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(No Model.) 4 Sheets-Sheet 2.

E. SELLING.

CALCULATING MACHINE. No. 420,667. v Patented Feb. 4,1890.

WITNESSES INVENTIJR v v flw UNITED STATES PATENT OFFICE.

EDVARD SELLING, OF IVURZBURG, BAVARIA, GERMANY. I

CALCULATING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 420,667, dated February4, 1890.

Application filed May 21, 1886. Serial No. 202,931. (No model.) Patentedin France April 12, 1886, No. 175,412; in Germany April 16, 1886, No.39,634 in England July 8, 1886, 110.3,912 an Austria-Hungary August 2,1886,110 31,289; in Belgium August 4, 1886, No. 74,104, and in ItalySeptember 30, 1886, XX, 20,826.

To all whom, it may concern.-

Be it known that I, EDWARD SELLING, of WVurzburg, Germany, have inventeda new and Improved Calculating-Machine, (which has been patented in thefollowing countries: in England, No. 8,912, dated July 8, 1886; inGermany, No. 39,634, dated April 16, 1886; in France, No. 175,412, datedApril 12, 1886; in Austriallungary, No. 31,289, dated August 2, 1886; inBelgium No. 74,104 B, dated August 4, 1886; in Italy, No. 20,326, datedSeptember 30, 1886,) of which the following is a specification.

This invention relates to a machine for facilitating the solution ofarithmetical problems; and it consists in the various features ofimprovement, more fully pointed out in the claims and specification.

In the accompanying drawings, FigureI is a top View of the machinebefore operation. Fig. II is a top view of the same, showing a positionduring operation. Fig. III is a longitudinal vertical section at line aa, Fig. I. Fig. IV is a side view of part of one of the racks and pinsat an enlarged scale. Fig. V is an end View of the same. Fig. VIis aside view of one of the gear-wheels B, and Fig. V1 is a side view ofdisks A. Fig. V11 is a side view of the disks A, with gearing. Fig. VIIIis a cross-section at line 9 Fig. l, 011 an enlarged scale. Fig. IX is afront view of some of the disks A and gear-wheels B, withconnecting-gearing, on an enlarged scale, partly in section.

Upon a fixed shaft m, supported in the frame X of the machine, a numberof disks A and gear-wheels B are placed loosely, connected together, asfollows: The gear-wheels B carry a wheel I) on one side and a pinion con the other side, meshing into a wheel (Z, fast 011 one side of thedisk A, and which said disk has a wheel 6, fastened on its oppositeside, meshing into the wheel I; of the adjoining gear-wheel B. The wheelI) on the outer or first gear-wheel B meshes into a wheel 6, attached tothe shaft m. The wheel Z) and pinion c are fast on a shaft passingthrough the wheel B, and capable of turning independent of said wheel13.

The disks A have raised figures, from O to 9, four times repeated upontheir periphery, and the gearing is so arranged that a continual motionis communicated from one disk to the next adjoining disk equal toone-tenth of the motion of the units-wheel. On one side of the disksAfour projecting pins f are arranged.

Upon the shaft m levers i are placed, held in position by a spring at,wound around the shaft m. These levers t carry a bar 13, provided withprojections 14, capable of passing close to the sides of the disks A andto'be brought in contact with the projections f on the sides of saiddisks. (See Fig. VIII.) The outer or end lever tis provided with anelongation forming a handle, to which a lever 15 is centered, connectedto an arm 16, fast to the bar 13. An upper. arm 18 of the levert isconnected through rod 17 with an arm 19, attached to a bar 20, placedbehind the disks A, and provided with projections 22, similar to theprojections 14 on the bar 13.

During the operation of the machine the projections 14 and 22 are in theposition rep resented in Fig. VIII, so that the disks A may revolvefreely without their projecting pins f coming in contact with theseprojections.

When it is desired to operate with the machine, the disks A must bemoved in such a position that all the figures O are in a straight line.This is produced by turning the bar 13 by means of lever 15 and itsconnecting arm 16, whereby the projections 14 on the bar 13 are moved insuch aposition that said projections 14 will come in contact with theprojections f on the disks A. The lever 15 is then retained in thatposition and moved together with the lever 25 around its supportingshaftm, carrying thereby the bar 13 around the periphery of the disks A, andthus moving, whenever one of the projections 14 comes in contact with aprojection f, the corresponding disk in such a position that at the endof the motion of lever t the figures 0 on the periphery of all the disksare in a straight line. By this motion of the lever If the bar 20 willat the same time be turned through its arm 19 and connecting-rod 17, so

that the projections 22 will be moved toward the centers of the disks.By this arrangement another set of the projections f on the face of thedisks A will come in contact with said projections 22 when the disks Ahave been turned by the action of the bar 13, and thus the disks will beprevented from moving beyond the required point.

Near the front of the machine a shaft O is supported in bearings in theframe X. This shaft is capable of turning in its bearings and likewiseof sliding sidewise. To this shaft 0 rods E E are attached, carrying aframe D, capable of sliding on said rods. Near the rear end of themachine a frame D is connected to these rods.

L L are two sets of lazy-tongs or extensible frames. Each set oflazy-tongs consists of a series of levers crossed as usual and havingten pivotal connecting-points marked 0 1 2 3 t 5 (3 7 S 9. The leversare connected together by cross-bars 10 tr, the. The bar to", connectingthe points 0 0 of the lazy-tongs, is attached to the shaft 0, while thebar to", that connects the points 9 9 of the lazy-tongs, is fastened tothe frame D. By this arrangement and connection of the lazy-tongs andframe D an extensible frame is obtained. A scale F is placed above thelazy-tongs L, and is attached on one end to the shaft 0 and at the otherend to the frame D.

To the frame D a sliding pointer G is attached capable of being movedinto the recesses 1 2 3, &c., on the scale plate F. In Fig. II thispointer is represented as being moved into the recess 2 on thescale-plate.

Above the cross-bars 10 w, &c., bars. h h 7L3, &c., are arranged, therear ends of which form racks capable of meshing into the gear-wheels B.These bars 7i 7L2 71 tt'cl, are guided in a plate g, attached to theframe D, as well as between suitable guiding-plates i, attached to theframe D.

Above the forward ends of the bars 71 762 71 small frames 7' r "r arearranged, attached to these bars and containing ten pins 8 each. Insteadof marking each pin, a surrounding plate 1 is marked on the sides from 0to 9. These pins 3 (see Fig. V) are provided with a cam-shaped collar1), acted upon by a coiled spring 7:, surrounding the bottom of eachpin, and by a spring-plate 76, attached. to the side of the bars h, the.By this arrangement the pressing downward of any one of these pins willcause the spring-plate 7c to move outward by the action of itscone-shaped collar 19, relieving thereby the cam-shaped collar of anyother spring which was previously held downward by said spring-plate,when its corresponding spiral spring will force said pin upward, inconsequence of which there will never be two pins down at one and thesame time. The pressing down of one of the pins in frame 7* connects thebar h with the cross-bars corresponding with the number of thepressed-down pin, and the pressing down of a pin in the frame r connectsthe bar 7&2

with the cross-bar corresponding with the number of the presseddown pin.

Below the frame D a shaft II is arranged, provided with one or more camsJ, acting against the under side of the frame D so as to lift the sameupward and bring thereby the racks on the bars h 71 &c., into gear withthe teeth of gear-wheels B.

Upon the shaft H an arm g is placed, connected through a rod N with alever M, centered on the frame X near the front of the machine, by theaction of which the shaft IT can be turned, so as to cause its cams J toact upon the frame D to lift the same and bring the racks into gear orto allow .aid f time to fall downward, and thus bring the racks clear ofthe gear-wheels B. The arm g is provided with an extension 1*, which,when said arm is moved so as to bring the racks into gear, engages asmall recess 23 on the lever 15, or it comes against the end of saidlever, thereby locking the same and preventing the shaft 13 from beingturned or moved during the operation of the machine.

The operation of the machine is as follows: The cams J are first movedso as to allow the frame D to fall downward to bring the racks 7t 71?,&e., clear of the gear-wheels B. The disks A are then set to zero in themanner described.

To ascertain the exact position and likewise to facilitate the readingof any number on the disks after the completion of the operation, a lineor cord is stretched from side to side of the frame in front of thedisks A. (See Figs. I and II.) The lazy-tongs L L are then closed andthe frame D is moved toward the front of the machine, so as to bring allthe corresponding pins sin a line and directly over their correspondingcross-bars w 20 &c. The pins in line 0 are then pressed downward,whereby all other pins which may before have been pressed downward willbe moved upward in consequence of the action of the spring-plates 7; andcoiled spring k, as above described. The pressing down of the pins inthe line 0 connects all the frames 0" 0' &c., and the bars h 71.2, &c.,with the crossbar '10. In this position the machine is ready foroperation.

Suppose we wish to add four hundred and twenty-three to one hundred andninety-two. Press down pins at, 2, and Sin three adjoining frames, asshown in the drawings in frames 1', r and 0' whereby the respective bars72 71. and 7L2 will be connected with the crossbars w 10 and 10respectively. Then move lever M to raise frame D, and bring thereby theracks in gear with their gear-wheels B. Then move frame D, extendingthereby the lazytongs until the pointer G comes opposite recess 1 onscale F and lock the frame in that position. Then turn the levers M soas to bring the racks clear of the gear-wheels B, move pointer G backagain, and close thelazytongs. Now press pins 1, 9, and 2 upon the sameframes r2 1 and r whereby the re- IIO ' spective bars h", h and it willbe connected with the cross-bars w w 10 respectively. By this operationthe pins 4, 2, and 3 will move upward on account of their respectivesprings, as above described. The racks are then moved again into gearingwith their gear-wheels B, the lazy-tongs again extended until thepointer comes opposite recess 1 on the scale, and the sum 615 willappear on the face of the disks A above the line of cord 2. The machineis then moved again into its normal position, and the disks A placed atzero, when the same is ready for the next operation.

To multiply, say, four hundred and twentythree by two, press down pins4, 2, and 3 upon any adjoining frames. Move the racks into gear withtheir gear-wheels B, and move frame D, extending thereby the lazy-tongsuntil the pointer G will be opposite recess 2 in the scale F, and theproduct 846 will appear upon the face of the disks A above the line orcord ,2. (See Fig. II.)

What I claim is- 1. The combination of a series of disks with a seriesof racks adapted to be thrown into gear with said disks, and with anextensible frame and pins for connecting the racks to the extensibleframe, substantially as specified.

2. The combination of a series of disks with a shaft upon which saiddisks are placed, and with a series of racks, an extensible frame, andpins for locking the racks to the extensible frame, and With a cam forraising the rear end of the racks, substantially as specified.

3. I11 a calculating-machine, the combination of a pair of lazy-tongs LL with crossbars w 10 &c., connecting their fulcrums with sliding frameD, and with bars h 7L2, having frames 1" r and pins 5, as and for thepurpose described.

4. The-combination, with gear-wheels R and disks A, placed alternatelyside by side on a shaft 'm, of the gearing Z) and c on the gear-Wheelsl3, and gearing d and e on the disks A, substantially as described.

5. The combination of a series of disks with a series of engaging racksand with an extensible frame, and a set of pins provided with cam-shapedcollars, and springs for causing an engagement between the racks and theextensible frame, substantially as set forth.

I11 testimony that I claim the foregoing as my own inv ntion I affix mysignature in presence of two witnesses.

EDIVARD SELLING.

Witnesses:

DUERKE SCHEOLER, FRIEDRIOK SOHWEITZER.

